Flora of North America species comparison

long-creeping, 1.5–3 mm diam.

short- to long-creeping, 4–8 mm diam.

monomorphic, dying back in winter, often 1 cm or more apart, fertile leaves often somewhat longer than sterile leaves, 25–80 cm.

monomorphic, evergreen, up to 2(–3) cm apart, (15–)50–160 cm.

straw-colored above base, 12–45 cm × 1–3 mm, at base sparsely set with tan, ovate, glabrous scales.

straw-colored, (5–)20–80 × (1–)3–6 mm, at base with brown, linear-lanceolate, hairy scales.

lanceolate, 14–35 cm, proximal pinnae largest, or lowest pair slightly smaller, blade tapered gradually to pinnatifid apex.

(9–)30–80 cm, broadest at base, gradually tapered to pinnatifid apex.

deeply pinnatifid to ca. 1 mm from costa, 3–10 × 1–2 cm;

segments oblong, somewhat oblique, entire;

proximal pair of veins from adjacent segments meeting margin above sinus.

(2–)8–15(–20) × (0.6–)1–2.5 cm, incised 3/5–4/5 of width;

segments oblong, rounded to acute at apex;

proximal pair of veins from adjacent segments running to sinus, or nearly so.

round, medial;

indusia tan, often glandular;

sporangia glabrous.

round, medial to supramedial;

indusia tan, hairy, hairs 0.2–0.4 mm;

sporangial glands obscure, yellowish, stalked, arising from sporangial stalks.

abaxially of sparsely set hairs 0.2–0.4 mm primarily on costae, also of yellowish short-stalked glands less than 0.1 mm, blade tissue with numerous reddish to orangish, resinous, shiny, sessile, hemispheric glands;

blades adaxially with scattered hairs on veins.

abaxially of hairs mostly 0.3–1 mm on costae, veins, and blade tissue;

veins adaxially with similar hairs but blade tissue usually without hairs, often with scattered yellowish, stalked glands 0.1 mm.

= 128.

= 144.